contfrac(1,[],-1)
contfracpnqn(Vecsmall([]))
contfracpnqn([])
contfracpnqn([],0)
contfracpnqn([],1)
contfracpnqn([2])
contfracpnqn([2],0)
contfracpnqn([2],1)
v=[1,2,3];
contfracpnqn(v)
contfracpnqn(v,0)
contfracpnqn(v,1)
contfracpnqn(v,2)
v=[1,2,3;4,5,6];
contfracpnqn(v)
contfracpnqn(v,0)
contfracpnqn(v,1)
contfracpnqn(v,2)
